Speed-control mechanism for air-motors.



N. 1). HOSLBY. SPEED CONTROL MEGHANISM FOR AIR MOTORS.

APPLICATION FILED FEB. 10, 1909 2,593, Patented July 27, 1909.

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' load whom ill-mag} concern:

. NELSON D. 'HOSLEYQCF MEBIDEN,

oonnnoriounnssreiion TO WILCOX & WHITE :COMPANY, ornnamnmoo NEeTioUT, aCORPORATION or eonnno'rreur.

' smash-common Mnonnnrsiu its era-morons Be it known that I, NELSON D. HosL-nY, a

"citizen of the United States,

; useful Improvements inSpeed-Control Mech- "anism for Air-Motors, ofwhich thefollowing w Meriden, county of-New Haven, State of 1Connecticut, have inventedcertain newand afu'lhclear, and exactdescription.

, My invention relates Inechanism for air motors, and is particularly 2though not aiiism ,ofthis character which is adapted for to speedcontrol exclusively concerned .With mechuse with theair'motorsiofauto-pneumatic 1 musicplaymg mstruments.

this purpose, by means of a. so-called speed controlboxg.

permitted ronome lever does notalways correspond In constructions such.control has been effected "connected with the air motor,- and having anexhaustexit controlled by a so-called metronome valve. This valveusually consists of a slot of graduated widthjin one Wall of the.

ly controlled by' the metronome lever ismounted. While such valvemechanism is speed box over which the slide plate adjust-, a

adequate and efficient. for ordinary purposes of control, it isfound'that this construction does not admit. of-the very fine gradationsin speed essential to the effective and correct I rendering of the tempoof music by auto-- pneumatic music playing instruments, for, y reason ofvariations in the size of the slot caused by contraction or expansion ofthe walls of the speed control box, and to imperfeet adjustment of theslide plate, the speed by a given adjustment of the met- I exactly withthe tempo indicated" upon the travels.

scale over which said metronome lever My invention aims to overcomethese difiioultics by providing in connection with a metronome valve,adjusting means whereby the exhaust opening due to a given adjustment ofthe valve may be regulated to the finest possible degree, of the motormay at all times correspond preciselywith the gradations indicated onthe metronome scale.

A further object of the inventionis to so construct saidadjustingmeansthatthe area of the valve opening may be regulated independentlyfor each'tempo desired.

-With* these and other objects in view, the invention consists in theconstruction and arrangement of parts, a preferred embodimentspecificationof'Letters Patent.

residing at in Fig. 1.

heretofore employed for v in order that the speed Patti-ma 2'2", recalApplication filed. February 1o, 909. seria no. 4mm.

of which is illustrated in the accompanyhig drawings, in which:

Figure 1 1s aperspective view of a speed control box of anauto-pneu1natic music playing instrument showing the connection so ofthemetron'ome lever therewith. Fig. Zia an enlargedview of certain partsillustrated:

Fig. 3 is a plan view of-the carts shown in Fig. 1, and rig. t is avertical-see tional view taken transversely of the speed box and-throughthe valve and regulating means therefore. l i

The embodiment of my invention herein selectedforillustration com risesthe speed";

form, can

box 1, which may be of usuaat its rear the exhaust chamber 2 and also aconnection 3 leading to the air-mete Upon the rear wall of the boxismou'nte block or plate 4 having a plurality of vah' e openings 5 whichcommunicate withthe en' 5 ballet-chamber 2. Over the openings sisslidably mounted the valve plate 6 carriedsuitable guides 7, which plateisconnect, with the usual'metronome lever 8 by a rod. 9.

10 .indicates a metronome scale over which? so the metronome leveri isarranged to he man ually adjusted by the operator. 1 Each of the valveopenings 5 may, if the sired, be of slightly greater area than thatnecessaryto permit of the required speed oi 8 5 the motor, andsaidvalve'openin s are ar ranged to be successively opened by move; men't of the valve plate '6' to the right, as. shown in Fig. 1, so that as agreater'nuinber of valve openings are imcovered, the speed of the motorwill be increased. In order to regulate the area of said valve openings,and to com ensate for any variations which may take place therein, eachof said openings is controlled by an adjustable screw plug 11, which maybe adjusted across the corre s onding opening and diminish or increase te area thereof, as desired. the construction herein illustrated, thevalve opening 5 to the left, Fig. 1, is of a size or area ap- 10proximately -to produce the tempo adagio 1n the playing instrument. Thenext opening above and to the right, when uncovered in addition to thefirst-opening permits in conjunction w'vith the first opening, of aspeed lea to produce the tempo .andantino, and each successive openingto the right in conjunction with those previously uncovered permits ofthe'speed'corfesponding to thetempos "and,ante, moderate, etc. 1.16

case the tempo produced by the uncovering of a given opening or openingsdoes not correspond precisely with that indicated by the position of thetempo lever 8 over the tempo scale 10, the corresponding valve opening 5may be reduced or increased in area to bring the tempo to the desiredpoint by means of adjusting one or the other of the regulating screws11. It Willbe seen therefore that the adjustment of the valve openingsmay be made inde endently for any given speed or tempo an that theregulation of the speed may be carried to the finest possible degree.

' WhileI have herein described a particular embodiment of my invention,it is to be understood that the same may be varied in details andrelative arrangement of'parts without departing from the spirit or scopethereof.

What I claim is:

1. A speed control mechanism for air motors comprising a valve opening,a sliding member adjustable over said opening, and means to vary thearea of said opening at difierent points throughout its extent.

2. A speed control mechanism for air motors comprising a valve, having aplurality of openings, a sliding member adjustably mounted over saidopenings, and means for independently varying the area of each ofsaidopenings.

3. A speed control mechanism for autopneumatic music playing instrumentscomprising a speed box, a motor connection therewith, an exhaustchamber, a valve interposed between said speed box and exhaust chamber,a sliding member controlling said valve opening, a metronome lever forcontrolling said sliding member, and means to vary the area of the valveopening at different points throughout its extent.

4. A speed control mechanism for autopneumatic music playing instrumentscomprising a speed control box, a motor connection communicatingtherewith, an exhaust chamber, a valve interposed between said box andexhaust chamber and comprising a plurality of valve openings, a slidingmember :u'ljustably mountcd over said openings, a metronome levercontrolling said sliding mcmbcr, and means for independently varying thearea of said valve openings.

A speed control mechanism for autopnennmtie music playing instrumentscomprising a speed control box, a motor connection communicatingtherewith, an exhaust chamber, a valve interposed between said box andsaid chamber and comprising a plurality of valve openings, a slidingmember 'adjustably mounted over said valve openings, and means forindependently varying the area of each of said valve openings.

A. G. KUIIULE, FRANK C. W nrrn.

